199997980

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{13}}^2\times {\mathrm{79}}^1\times {\mathrm{107}}^1$

素因数の和:228

約数の個数: 144

約数和(自身を含む): 531256320

約数和(自身を除く): 331258340

約数列:

[1, 2, 4, 5, 7, 10, 13, 14, 20, 26, 28, 35, 52, 65, 70, 79, 91, 107, 130, 140, 158, 169, 182, 214, 260, 316, 338, 364, 395, 428, 455, 535, 553, 676, 749, 790, 845, 910, 1027, 1070, 1106, 1183, 1391, 1498, 1580, 1690, 1820, 2054, 2140, 2212, 2366, 2765, 2782, 2996, 3380, 3745, 4108, 4732, 5135, 5530, 5564, 5915, 6955, 7189, 7490, 8453, 9737, 10270, 11060, 11830, 13351, 13910, 14378, 14980, 16906, 18083, 19474, 20540, 23660, 26702, 27820, 28756, 33812, 35945, 36166, 38948, 42265, 48685, 53404, 59171, 66755, 71890, 72332, 84530, 90415, 93457, 97370, 109889, 118342, 126581, 133510, 143780, 169060, 180830, 186914, 194740, 219778, 236684, 253162, 267020, 295855, 361660, 373828, 439556, 467285, 506324, 549445, 591710, 632905, 769223, 934570, 1098890, 1183420, 1265810, 1428557, 1538446, 1869140, 2197780, 2531620, 2857114, 3076892, 3846115, 5714228, 7142785, 7692230, 9999899, 14285570, 15384460, 19999798, 28571140, 39999596, 49999495, 99998990, 199997980]

約数ペア:

[(1, 199997980), (2, 99998990), (4, 49999495), (5, 39999596), (7, 28571140), (10, 19999798), (13, 15384460), (14, 14285570), (20, 9999899), (26, 7692230), (28, 7142785), (35, 5714228), (52, 3846115), (65, 3076892), (70, 2857114), (79, 2531620), (91, 2197780), (107, 1869140), (130, 1538446), (140, 1428557), (158, 1265810), (169, 1183420), (182, 1098890), (214, 934570), (260, 769223), (316, 632905), (338, 591710), (364, 549445), (395, 506324), (428, 467285), (455, 439556), (535, 373828), (553, 361660), (676, 295855), (749, 267020), (790, 253162), (845, 236684), (910, 219778), (1027, 194740), (1070, 186914), (1106, 180830), (1183, 169060), (1391, 143780), (1498, 133510), (1580, 126581), (1690, 118342), (1820, 109889), (2054, 97370), (2140, 93457), (2212, 90415), (2366, 84530), (2765, 72332), (2782, 71890), (2996, 66755), (3380, 59171), (3745, 53404), (4108, 48685), (4732, 42265), (5135, 38948), (5530, 36166), (5564, 35945), (5915, 33812), (6955, 28756), (7189, 27820), (7490, 26702), (8453, 23660), (9737, 20540), (10270, 19474), (11060, 18083), (11830, 16906), (13351, 14980), (13910, 14378)]